Tungsten Carbide Burrs for Tough Applications
N
ew
3R C S
an ut pec
d s ial
3R
S
Special Performance in Foundry, Shipbuilding
and Steel Construction Applications
 New, innovative special cuts providing exceptional impact resistance.
 Highly rugged cut patterns minimize tooth chipping/breakage, splintering and burr head
failures.
 Developed specifically for applications involving high impact loads, the new 3R and 3RS
cuts are the latest addition to the existing PFERD range.
Tungsten Carbide Burrs for Tough Applications
New in the PFERD Range: Innovative High-Performance Cuts
For heavy-duty applications in shipyards,
foundries and steel construction, PFERD has
developed two new special cut patterns for its
tungsten carbide burrs.
minimized. Even when milling at low RPM
with an only moderately powerful machine,
the occurrence of tooth failures is markedly
reduced.
The new 3R and 3RS cuts are the latest addition to the existing PFERD range. They are
not intended as substitutes for our proven
standard cuts for general-use burrs.
The new 3R and 3RS cuts represent a new
PFERD product line designed especially for
tough operating conditions. These tungsten
carbide burrs are characterized by their exceptional impact resistance and performance. The
new cuts are ideal for all uses involving high
mechanical shock or impact loads. Susceptibility to tooth chipping/breakage, splintering
and burr head cracking has been effectively
Like all other PFERD quality burrs, our 3R
and 3RS cut types distinguish themselves
by their perfectly matched tooth geometry,
number of teeth, helix angle, rake angle, and
concentricity. Thanks to a very high stock
removal capability over the entire service
life, these tools deliver outstanding results in
minimum time.
For the complete line of tungsten carbide burrs
please refer to our PFERD Catalogue 202,
which we shall be glad to send to you upon
request!
The new 3R and 3RS cut patterns minimize tooth breakage on tungsten carbide burrs
Problem
Chipping, tooth failures and major burr damage
are sometimes encountered in applications
involving high impact loads.
Solutions and advantages
Thanks to perfectly matched production
parameters, the new 3R and 3RS cut patterns
will substantially reduce tooth failures on
tungsten carbide burrs.
Cut 3R
Tooth chipping / failure
nCross cut.
nCoarse and aggressive machining
with high stock removal, even at low
RPM.
Cut 3RS
nCross cut.
nCoarse machining with smoother
burr operation, even at low RPM.
n Less aggressive than 3R cut.
Distribution in single-burr packs
Tungsten carbide burrs featuring the new 3R
and 3RS cut patterns are supplied in singleunit packs. The proven plastic box ensures an
optimum protection of burr teeth. For easy
differentiation from the remaining product
range, burrs with 3R and 3RS cuts are clearly
marked with the word “New“ on the pack.
2
Tungsten Carbide Burrs for Tough Applications
Recommendations for Use, Cut Patterns, Material Groups, Rotational Speeds
Material Groups
Application
Non-hardened, non-heat
treated steels up to
1200 N/mm²
(< 35 HRC)
Constructional steels
Carbon steels
Tool steels
Non-alloyed steels
Case-hardened steels,
Steel castings
Coarse machining =
high stock removal
with impact loading
Hardened, heat-treated
steels exceeding
1200 N/mm²
(> 35 HRC)
Tool steels
Tempering steels
Alloyed steels
Steel castings
Coarse machining =
high stock removal
with impact loading
Cast iron
Grey cast iron
Spheroidal graphite cast
iron
Coarse machining =
high stock removal
with impact loading
Recommended rotational speeds
(RPM) for tungsten carbide burrs
for tough applications
See the table across for the recommended
rotational speeds (RPM) of burrs in the various
diameters.
Note that optimum RPM is a function of the
cutting rate (m/min) as indicated in the table.
Example:
Tungsten carbide burr, cut 3R,
12 mm head diameter,
coarse machining of non-hardened and
non heat-treated steels.
Cutting rate: 250 - 600 m/min
Rotational speed: 7,000 - 16,000 RPM
Cut
Recommended
cutting rate
3R
250 - 600 m/min
3RS
250 - 600 m/min
3R
250 - 350 m/min
3RS
250 - 350 m/min
3R
250 - 600 m/min
3RS
250 - 600 m/min
Cutting rate (m/min)
m/min
250
300
8
10,000
12,000
14,000
10
8,000
10,000
12
7,000
8,000
16
5,000
6,000
Ø mm
350
450
500
600
18,000
20,000
24,000
11,000
14,000
16,000
19,000
9,000
12,000
13,000
16,000
7,000
9,000
10,000
12,000
Rotational speed (RPM)
Safety notes
= Wear safety goggles!
= Use ear protection!
= Observe safety
recommendations!
For safety reasons, tungsten carbide burrs
with longer shafts must be operated at
substantially lower RPM levels (refer also to
page 7).
Use only rigid clamping systems and
power tools to avoid safety hazards!
3
Tungsten Carbide Burrs for Tough Applications
Standard Shapes
d1
Cylindrical
ZYAS
Cylindrical burr according to DIN 8032 (shape
ZYAS) with circumferential.
d2
l2
l1
Application
Interior contour work, i.e., peripheral and
face milling
Ordering example
ZYAS 0820/6 Z3R
Order No.
Available cuts
3R
3RS
EAN 4007220
ZYAS 0820/6
ZYAS 1020/6
ZYAS 1225/8
769997
770023
770054
Shank dia.
d2
[mm]
Head dia. x
length
d 1 x l2
[mm]
Overall
length
l1
[mm]
6
6
8
8 x 20
10 x 20
12 x 25
60
60
65
Shank dia.
d2
[mm]
Head dia. x
length
d 1 x l2
[mm]
Overall
length
l1
[mm]
6
6
8
8 x 20
12 x 30
12 x 30
60
70
70
-
1
1
1
25
33
56
1
1
1
22
48
48
1
1
1
30
35
53
r
Flame shape burr.
d2
d1
Flame Shape B
Application
Contouring
l2
l1
Ordering example
B 0820/6 Z3R
Order No.
Available cuts
3R
3RS
EAN 4007220
B 0820/6
B 1230/6
B 1230/8
770061
770085
770092
d1
Ball Shape KUD
-
d2
l2
l1
Ball-shaped burr according to DIN 8032
(shape KUD).
Application
Contouring
Bore deburring
Milling in preparation of build-up welding
Bestellbeispiel
KUD 1210/6 Z3R
Order No.
Available cuts
3R
3RS
EAN 4007220
KUD 1210/6
KUD 1210/8
KUD 1614/8
4
770160
770177
770184
-
Shank dia.
d2
[mm]
Head dia. x
length
d 1 x l2
[mm]
Overall
length
l1
[mm]
6
8
8
12 x 10
12 x 10
16 x 14
50
50
54
Tungsten Carbide Burrs for Tough Applications
Standard Shapes
Cylindrical
with Radius End WRC
d1
d2
l2
l1
General-use shape (combination of cylindrical
and spherical geometries) in accordance with
DIN 8032 (shape WRC).
Application
Surface milling
Contouring
Ordering example
WRC 0820/6 Z3R
Order No.
Available cuts
3R
3RS
Shank dia.
d2
[mm]
Head dia. x
length
d1 x l2
[mm]
Overall
length
l1
[mm]
6
6
6
8
8 x 20
10 x 20
12 x 25
12 x 25
60
60
65
65
Shank dia.
d2
[mm]
Head dia. x
length
d1 x l2
[mm]
Overall
length
l1
[mm]
6
6
8
8
10 x 20
12 x 25
12 x 25
16 x 25
60
65
65
65
EAN 4007220
WRC 0820/6
WRC 1020/6
WRC 1225/6
WRC 1225/8
770108
770115
770122
769881
770139
770153
1
1
1
1
25
32
52
59
1
1
1
1
25
40
47
64
flattened tip
Pointed
Tree SPG
d
Bullet-shaped burr according to DIN 8032
(shape SPG).
d2
1
l2
Application
Work on narrow contours
Milling of acute-angled surfaces
l1
Ordering example
SPG 1020/6 Z3R
Order No.
Available cuts
3R
3RS
EAN 4007220
SPG 1020/6
SPG 1225/6
SPG 1225/8
SPG 1625/8
770252
770276
770283
770290
770269
770306
r
d
d2
1
Tree
with Radius End RBF
l2
Tree-shaped burr according to DIN 8032
(shape RBF).
Application
Work on narrow workpiece contours
l1
Ordering example
RBF 0820/6 Z3R
Order No.
Available cuts
3R
3RS
EAN 4007220
RBF 0820/6
RBF 1020/6
RBF 1225/6
RBF 1225/8
770191
770207
770214
770221
770238
770245
Shank dia
d2
[mm]
Head dia. x
length
d1 x l2
[mm]
Radius
r
[mm]
Overall
length
l1
[mm]
6
6
6
8
8 x 20
10 x 20
12 x 25
12 x 25
1,2
2,5
2,5
2,5
60
60
65
65
1
1
1
1
21
28
43
49
5
Tungsten Carbide Burrs for Tough Applications
Standard Shapes
Taper burr with radius end according to DIN
8032 (shape KEL).
Angle a = 14°
α
Conicalr with Radius End KEL
d1
d2
Application
Work on narrow workpiece contours and
surfaces
l2
l1
Ordering example
KEL 1225/6 Z3R
Order No.
Available cuts
3R
3RS
EAN 4007220
KEL 1225/6
KEL 1225/8
770320
770337
Radius
r
[mm]
Overall
length
l1
[mm]
6
8
12 x 25
12 x 25
3,3
3,3
65
65
1
1
39
47
1
1
1
27
41
48
Oval burr according to DIN 8032 (shape TRE).
r
d1
d2
l2
l1
Application
Contouring
Ordering example
TRE 1016/6 Z3R
Order No.
Available cuts
3R
3RS
EAN 4007220
6
Head dia. x
length
d1 x l2
[mm]
-
Oval TRE
TRE 1016/6
TRE 1220/6
TRE 1220/8
Shank dia.
d2
[mm]
770344
770351
770368
770382
-
Shank dia.
d2
[mm]
Head dia. x
length
d1 x l2
[mm]
Radius
r
[mm]
Overall
length
l1
[mm]
6
6
8
10 x 16
12 x 20
12 x 20
4,0
5,0
5,0
56
60
60
Tungsten Carbide Burrs for Tough Applications
Long Shank Versions, Drive Spindle Extensions
Long shank versions – available
on request
Tungsten Carbide Burrs with Special Shank Lengths
Tungsten carbide burrs for tough applications
are optionally available in 150 and 200 mm
shank lengths. These tools are particularly well
suited for use in hard-to-reach areas. Because
of their hight impact-resistance characteristics
they represent an optimum combination of
a tungsten carbide burr and a long shank or
shank extension, respectively. Shanks may also
be cut to length by the user.
Safety notes
Special-length burrs and burrs with long
shanks must be placed on the workpiece
(or inserted in the bore or slot to be
maschined) before the machine is powered
up. As a rule, the tool ought to remain in
contact with the workpiece for as long as
the machine is running. Failure to observe
this procedure may result in shank failure and
hence, an increased accident risk
For safety reasons, tungsten carbide burrs
with longer shafts must be operated at
substantially lower RPM levels.
Use only rigid clamping systems and
power tools, respectively, to avoid safety
hazards!
Drive spindle extensions
For work in hard-to-reach areas (e.g., in pipes
and ducting), burrs may also be combined
with a spindle extension. The extension is
mounted in the collet chuck of the machine
(air-powered or electric), or in the handpiece
of the flexible shaft.
Extension SPV 100-8
144
13,5
8
Spindle extensions are a low-cost alternative
to buying extra burrs.
871.00.357
Burr ZYA
with shank extension SPV 100-8
EAN
4007220
Shank dia.
[mm]
Shank length
[mm]
Tool mount
bore dia.
[mm]
Overall
length
[mm]
185261
8
30
6
144
Extension SPV 75-8
120
13
Applicable safety regulations and
accident prevention rules must be duly
observed when using drive spindle
extensions!
Extension for 6 mm shanks.
n max. = 20,000 RPM
including 6 mm collet, collet group 10,
PFERD Tool Manual, Catalogue 209
30
Order No.
Important!
8
871.00.358
115
Extension for 6 mm shanks.
n max. = 20,000 RPM
including 6 mm collet, collet group 10,
PFERD Tool Manual, Catalogue 209
Burr ZYA
with shank extension SPV 75-8
30
Order No.
1
EAN
4007220
Shank dia.
[mm]
Shank length
[mm]
Tool mount
bore dia.
[mm]
Overall
length
[mm]
185278
8
30
6
120
1
90
7
Tungsten Carbide Burrs for Tough Applications
Suitable Tool Drives
An optimum match between tool and power
source is a necessary condition for the costefficient use of PFERD rotary tools.
Addressing diverse materials, workpieces and
machining operations, PFERD offers a broad
diversity of combination options based on
three different tool drive systems:
Straight air grinders
PG 8/220 V-HV
PG 10/200 V-HV
Speed:
Power:
Speed:
Power:
22,000 RPM
600 W
20,000 RPM
900 W
Straight air grinders of lengthened design,
with steel housing, are particularly suitable
for heavy-duty milling in hard-to-reach spots.
These machines provide accurate tool control.
PFERD supplies straight air grinders which, in
terms of output RPM, perfectly match the recommended cutting rates for our new special
cut patterns.
PG 10/160 V-HV
PG 12/120 V-HV
Speed:
Power:
Speed:
Power:
16,000 RPM
900 W
Printed in Germany.
Air-powered machines
Electric machines
Flexible shaft drives.
12,000 RPM
1,000 W
For further information and a full description of our entire range of tool drives
please refer to our PFERD Tool Manual,
Catalogue 209, and our “New in the
PFERD Range - 2008” brochure.
PG 8/50 V-HV
Speed with oil: 16,000 RPM
Speed without oil:370 W
Power with oil: 13,000 RPM
Power without oil:340 W
Speed:
Power:
5,000 RPM
600 W
Straight electric grinders
UGER 11/330 SI
UGER 5/90 SI
Speed:
Power:
Speed:
Power:
15,000-33,000 RPM
650 W
04/2008
The output speeds (RPM) of these machines
are variable either steplessly*¹ or in steps*².
The overdrive unit ST 103, with its 1:3 transmission ratio, provides tool speeds of up to
36,000 RPM.
PWS 5/160 HV
4,000-9,000 RPM
500 W
819 133
PFERD offers flexible shaft drives based on
universal motors or three-phase a.c. machines
designed for free-standing, suspended or
mobile operation.
Subject to technical modification.
Powerful straight electric grinders with
stepless speed control are ideally suited for
mobile use thanks to their compact and rugged design.
Flexible shaft drives*³
Multi-Speed Machine
Mammoth Electronic ME 22/150*¹
Multi-Speed Machine
Mammoth MD 10*²
Multi-Speed Machine
RUER 10/250 SI*²
Speed:
Power:
Speed:
Power:
Speed:
Power:
0-15,000 RPM
2,700 W
850-12,000 RPM
1,000 W
11,000-25,000 RPM
1,050 W
*³ with flexible shaft
Order No.
7 ZG DIN 10
10 ZG DIN 10
8
Illustration
Rotational speed
[RPM]
Power
[W]
11,000-25,000
800-1760
750-18,000
140-2450